CodeYourFuture · leilafarsani · Dec 6, 2022 · Dec 6, 2022 · jonnywyatt · Dec 10, 2022
diff --git a/1-exercises/A-undefined/exercise.js b/1-exercises/A-undefined/exercise.js
@@ -13,15 +13,18 @@
 let a;
 console.log(a);
 
+// The variable "a" is declared but no value is assigned to it.
 
 // Example 2
 function sayHello() {
     let message = "Hello";
 }
 
+
 let hello = sayHello();
 console.log(hello);
 
+// The function doesn't return a value.
 
 // Example 3
 function sayHelloToUser(user) {
@@ -30,7 +33,10 @@ function sayHelloToUser(user) {
 
 sayHelloToUser();
 
+// No value is passed for the function parameter "user".
 
 // Example 4
 let arr = [1,2,3];
 console.log(arr[3]);
+
+// There is no value for array fourth element.
diff --git a/1-exercises/B-while-loop/exercise.js b/1-exercises/B-while-loop/exercise.js
@@ -7,7 +7,16 @@
 
 function evenNumbers(n) {
     // TODO
-}
+     let i = 0;
+     let even = [];
+     while (i < 2 * n) {
+       even.push(i);
+       i += 2;
+     }
+     return even.toString();
+   }
+   console.log(evenNumbers());
+
 
 evenNumbers(3); // should output 0,2,4
 evenNumbers(0); // should output nothing

diff --git a/1-exercises/C-while-loop-with-array/exercise.js b/1-exercises/C-while-loop-with-array/exercise.js
@@ -5,19 +5,26 @@
 */
 
 const BIRTHDAYS = [
-    "January 7th",
-    "February 12th",
-    "April 3rd",
-    "April 5th",
-    "May 3rd",
-    "July 11th",
-    "July 17th",
-    "September 28th",
-    "November 15th"
+  "January 7th",
+  "February 12th",
+  "April 3rd",
+  "April 5th",
+  "May 3rd",
+  "July 11th",
+  "July 17th",
+  "September 28th",
+  "November 15th",
 ];
 
 function findFirstJulyBDay(birthdays) {
-    // TODO
+  // TODO
+  let i = 0;
+   while (i < birthdays.length) {
+    if (birthdays[i][1] === "u") {
+      return birthdays[i];
+    }
+    i++;
+  }
 }
 
 console.log(findFirstJulyBDay(BIRTHDAYS)); // should output "July 11th"
diff --git a/1-exercises/D-do-while/exercise.js b/1-exercises/D-do-while/exercise.js
@@ -7,7 +7,13 @@
 */
 
 function evenNumbersSum(n) {
-    // TODO
+// TODO
+ let i = 0;
+ let sum = n * (n - 1);
+ do {
+   return sum;
+   i++;
+ } while (i < 5);
 }
 
 console.log(evenNumbersSum(3)); // should output 6

diff --git a/1-exercises/E-for-loop/exercise1.js b/1-exercises/E-for-loop/exercise1.js
@@ -6,9 +6,14 @@
 
 
 // Change the below code to use a for loop instead of a while loop.
-let i = 0;
+/*let i = 0;
 while(i < 26) {
     console.log(String.fromCharCode(97 + i));
     i++;
+}*/
+
+for (let i = 0; i < 26; i++) {
+  console.log(String.fromCharCode(97 + i));
 }
+
 // The output shouldn't change.
diff --git a/1-exercises/E-for-loop/exercise2.js b/1-exercises/E-for-loop/exercise2.js
@@ -27,7 +27,10 @@ const AGES = [
 ];
 
 // TODO - Write for loop code here
-
+for (i = 0; i < WRITERS.length; i++) {
+  let text = WRITERS[i] + " is " + AGES[i] + " years old";
+  console.log(text);
+}
 /*
 The output should look something like this:
 

diff --git a/1-exercises/F-for-of-loop/exercise.js b/1-exercises/F-for-of-loop/exercise.js
@@ -11,6 +11,13 @@ let tubeStations = [
     "Tottenham Court Road"
 ];
 
+for (let tube of tubeStations){
+ console.log(tube);
+}
 
 // TODO Use a for-of loop to capitalise and output each letter in the string seperately.
 let str = "codeyourfuture";
+
+for (let x of str){
+    console.log(x.toLocaleUpperCase());
+}
diff --git a/2-mandatory/1-weather-report.js b/2-mandatory/1-weather-report.js
@@ -13,9 +13,8 @@
 
 function getTemperatureReport(cities) {
     // TODO
+  return cities.map(el => "The temperature in " + el + " is " + temperatureService(el) + " degrees");
 }
-
-
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 function temperatureService(city) {

diff --git a/2-mandatory/2-retrying-random-numbers.js b/2-mandatory/2-retrying-random-numbers.js
@@ -10,8 +10,14 @@ function generateRandomNumber() {
 }
 
 function getRandomNumberGreaterThan50() {
-    // TODO - implement using a do-while loop
+  // TODO - implement using a do-while loop
+  let n;
+   do {
+    n = generateRandomNumber();
+   } while (n <= 50);
+  return n;
 }
+console.log(getRandomNumberGreaterThan50());
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 

diff --git a/2-mandatory/3-financial-times.js b/2-mandatory/3-financial-times.js
@@ -5,16 +5,29 @@
     Implement the function below, which will return a new array containing only article titles which will fit.
 */
 function potentialHeadlines(allArticleTitles) {
-    // TODO
+  // TODO
+  let articleArr = [];
+  for (let i = 0; i < allArticleTitles.length; i++) {
+    if (allArticleTitles[i].length <= 65) {
+      articleArr.push(allArticleTitles[i]);
+    }
+  }
+  return articleArr;
 }
-
 /*
     The editor of the FT likes short headlines with only a few words!
     Implement the function below, which returns the title with the fewest words.
     (you can assume words will always be seperated by a space)
 */
 function titleWithFewestWords(allArticleTitles) {
     // TODO
+   let wordsCount= [];
+    for (let i = 0; i < allArticleTitles.length; i++){
+      wordArticle = allArticleTitles[i].split("");
+      wordsCount.push(wordArticle.length);
+    }
+    let index = wordsCount.indexOf(Math.min(...wordsCount))
+    return allArticleTitles[index];
 }
 
 /*
@@ -24,6 +37,14 @@ function titleWithFewestWords(allArticleTitles) {
 */
 function headlinesWithNumbers(allArticleTitles) {
     // TODO
+    let numArticle = [];
+    let pattern =/[0-9]/g;
+    for (let i=0; i<allArticleTitles.length; i++){
+        if (allArticleTitles[i].search(pattern)!= -1 ){
+            numArticle.push(allArticleTitles[i]);
+        }
+    }
+    return numArticle;
 }
 
 /*
@@ -32,6 +53,13 @@ function headlinesWithNumbers(allArticleTitles) {
 */
 function averageNumberOfCharacters(allArticleTitles) {
     // TODO
+    let total = 0;
+    for (i=0; i < allArticleTitles.length; i++){
+        total += allArticleTitles[i].length;
+        average = total / allArticleTitles.length;
+        roundedAverage = Math.round(average);
+    }
+    return roundedAverage;
 }
 
 

diff --git a/2-mandatory/4-stocks.js b/2-mandatory/4-stocks.js
@@ -35,6 +35,18 @@ const CLOSING_PRICES_LAST_5_DAYS_FOR_ALL_STOCKS = [
 */
 function getAveragePrices(closingPricesForAllStocks) {
     // TODO
+    let averageArr = [];
+    for (let i = 0; i < closingPricesForAllStocks.length; i++) {
+        let total = 0;
+        for (let j=0; j < closingPricesForAllStocks[i].length; j++){
+            total += closingPricesForAllStocks[i][j];
+        }
+        let average = total / closingPricesForAllStocks[i].length;
+        let roundedAverage = Number(average.toFixed(2));
+        averageArr.push(roundedAverage);
+
+    }
+    return averageArr;
 }
 
 /*
@@ -49,6 +61,12 @@ function getAveragePrices(closingPricesForAllStocks) {
 */
 function getPriceChanges(closingPricesForAllStocks) {
     // TODO
+    let changeArr=[];
+    for (let i = 0; i < closingPricesForAllStocks.length; i++){
+        let change = closingPricesForAllStocks[i][closingPricesForAllStocks.length - 1] - closingPricesForAllStocks[i][0];
+        changeArr.push(Number(change.toFixed(2)));
+    }
+    return changeArr;
 }
 
 /*
@@ -64,7 +82,13 @@ function getPriceChanges(closingPricesForAllStocks) {
     The price should be shown with exactly 2 decimal places.
 */
 function highestPriceDescriptions(closingPricesForAllStocks, stocks) {
-    // TODO
+// TODO
+    let maxArray = [];
+    for (let i = 0; i < closingPricesForAllStocks.length; i++){
+    let maxStocks = Math.max(...closingPricesForAllStocks[i]).toFixed(2);
+    maxArray.push("The highest price of " + stocks[i].toUpperCase() + " in the last 5 days was " + maxStocks);
+    }
+    return maxArray;
 }
 
 

diff --git a/3-extra/1-factorial.js b/3-extra/1-factorial.js
@@ -10,6 +10,17 @@
 
 function factorial(input) {
     // TODO
+  let result = 1;
+  let i = input;
+   if (input = 0) {
+      return 1;
+ } else { 
+      while (i > 0){
+      result *= i;
+      i--;
+    }
+  return result;
+  } 
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

diff --git a/3-extra/2-array-of-objects.js b/3-extra/2-array-of-objects.js
@@ -12,7 +12,32 @@
 
 function getHighestRatedInEachGenre(books) {
     // TODO
-}
+  let childrenGenre = [];
+  let nonFictionGenre = [];
+  let cookingGenre = [];
+  let booksArr = [];
+  for (let i = 0; i < books.length; i++) {
+    if (books[i].genre === "children") {
+      childrenGenre.push(books[i]);
+    } else if (books[i].genre === "non-fiction") {
+      nonFictionGenre.push(books[i]);
+    } else {
+     cookingGenre.push(books[i]);
+    }
+  }
+  let childrenSorted = childrenGenre.sort((a, b) => a.rating - b.rating);
+  let nonFictionSorted = nonFictionGenre.sort((a, b) => a.rating - b.rating);
+  let cookingSorted = cookingGenre.sort((a, b) => a.rating - b.rating);
+
+
+  booksArr.push(childrenSorted[childrenSorted.length - 1].title);
+  booksArr.push(cookingSorted[cookingSorted.length - 1].title);
+  booksArr.push(nonFictionSorted[nonFictionSorted.length - 1].title);
+
+  return booksArr;
+} 
+
+
 
 
 /* ======= Book data - DO NOT MODIFY ===== */

diff --git a/3-extra/3-fibonacci.js b/3-extra/3-fibonacci.js
@@ -15,6 +15,11 @@
 
 function generateFibonacciSequence(n) {
     // TODO
+    let fibSeq = [0, 1];
+    for (let i = 2; i < n; i++) {
+       fibSeq.push(fibSeq[i - 1] + fibSeq[i - 2]);
+    }
+    return fibSeq;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */